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      Germination of dormant seeds of Stylosanthes humilis as promoted by ethylene accumulation in closed environments Translated title: Germinação de sementes dormentes de Stylosanthes humilis promovida por acúmulo de etileno em ambientes fechados

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          Abstract

          Germination of scarified dormant seeds of Townsville stylo (Stylosanthes humilis) is very low in Petri dishes, but may be appreciable in sealed Erlenmeyer flasks if ethylene accumulates in their atmospheres. When ethylene in the flask atmosphere was fixed by a mercuric perchlorate solution, emanation of the gaseous regulator and germination of dormant seeds were drastically decreased. On the other hand, ethylene produced by dormant seeds and accumulated in the flask atmosphere led to a further enhancement of ethylene accumulation and a corresponding increased seed germination. Germination of both dormant and non-dormant seeds did not occur when ethylene biosynthesis was completely blocked.

          Translated abstract

          A germinação de sementes dormentes escarificadas de estilosante (Stylosanthes humilis) é muito baixa em placas de Petri, mas pode ser considerável em frascos de Erlenmeyer selados devido a um acúmulo de etileno em sua atmosfera. Quando esse etileno foi adsorvido por solução de perclorato de mercúrio, a emanação do regulador gasoso das sementes dormentes e sua germinação foram drasticamente diminuídas. O etileno produzido pelas sementes dormentes, ao difundir-se na atmosfera dos frascos, promoveu maior acúmulo do próprio gás e um correspondente aumento da germinação. Sementes dormentes e não-dormentes não germinaram quando a biossíntese do regulador foi completamente bloqueada.

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          Ethylene in plant biology

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            Responses of seed of Stylosanthes humilis to germination regulators

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              Germination of dormant seeds ofStylosanthes humilis as related to heavy metal ions

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                bjpp
                Brazilian Journal of Plant Physiology
                Braz. J. Plant Physiol.
                Brazilian Journal of Plant Physiology (Campos dos Goytacazes )
                1677-9452
                August 2004
                : 16
                : 2
                : 83-88
                Affiliations
                [1 ] Universidade Federal de Viçosa Brazil
                Article
                S1677-04202004000200003
                10.1590/S1677-04202004000200003
                60b2f4cd-e0b2-4993-a602-240d993049f8

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1677-0420&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Townsville stylo,closed environments,dormancy,ethylene,germination,seeds,estilosante,ambientes fechados,dormência,etileno,germinação,sementes

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